Roman numerals are represented by seven different letters: I, V, X, L, C, D and M. Which represent the numbers 1, 5, 10, 50, 100, 500 and 1,000. These seven letters are used to make thousands of numbers.

For example 17 is XVII.

Change language16 in English words

sixteen

even

Square root

4

Binary number

10000

16 in Fibonacci Sequence

No

This number consist from

2 digits

Sum of 2 digits (1+6)

7

Composite number (opposite to prime number).

The worldâ€™s oldest known spider lived to be 43. Named Number 16, she died after being stung by a wasp.
https://amp.cnn.com/cnn/2018/04/30/world/worlds-oldest-spider-dies-at-age-43-trnd/index.html